As the consequences of climate change continue to threaten the future of the planet, former U.S. vice president Al Gore is urgently trying to keep the energy revolution on its feet and this vital conversation alive. He pursues the empowering notion that, while the stakes have never been higher, the perils of climate change can be overcome with human ingenuity and passion. He sees real signs of hope in the leaps and bounds made over the last decade—but is crucially aware that progress could slow without dedicated support from government. Ten years after introducing the terrifying spectre of climate change to mass culture with Oscar-winning doc An Inconvenient Truth, Al Gore returns with another impassioned plea.